Fire-box muffler



I Snares ATENT rrica.

FIRE-BOX MUFFLER.

SPECIFICATION forming part of Letters Patent No. 319,778, dated June 9, 1885.

Application filed J annary 22, 1884. (No model.)

To all whom it may concern:

Be it known that I, ALFRED BERNEY, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massa chusetts, have invented certain new and useful Improvements in Fire-Box Mufflers; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in what is termed fire-box mufflers, and the object is to prevent the disagreeable noise occurring when the steam is blowing off from the safety valve, and at the same time to deaden or dampen the fire in the furnace,and thereby prevent the too rapid generation of steam in the boiler, especially when the englue is standing still.

The invention consists in the construction and arrangement of certain parts, as will be more fully described. hereinafter, and more definitely pointed out in the claims, reference being had to the accompanying drawings, and the letters of reference marked thereon.

Like letters indicate similar parts in the different figures of the drawings, in which Figure 1 is a longitudinal section of a locomotive-boiler with my improvements in position. Fig. 2 is a vertical cross-section on line a: as. Fig. 3 is a detail sectional view of the branch piece. Fig. 4 is a section on the perforated hood or muftlen. Fig. 5 is an enlarged cross-section of the same. Fig. 6 is a similar view of a modification. Fig. 7 is an enlarged section of one of the tubes or thimbles for the hood.

In the drawings, A represents a locomotiveboiler having the fire-box or furnace B, of ordinary construction. In this fire-box, at any suitable position, (shown in the drawings on the crown-sheet,) is secured the hood or muffler O. This hood is'made of iron or fire-clay, with a series of perforated plates, 0, placed transversely of the shell. The shell of the hood is provided with any suitable number of tubes or thimbles, d, which may be driven into holes drilled for the purpose, or they may be cast in place. They are made tapering, and between them is arranged a covering or filling of asbestus or other suitable fire-proof composition or material, as seen in Figs. 5 and 6, to prevent the burning out of the hood, and also to prevent the fire-proof material being knocked off.

' Instead of the perforated plates shown, I may employ perforated tubes, as represented in Fig. 6. At one or both sides of the furnace is attached a branch piece or T, D, connected by a pipe, 6, with the hooded safety-valve E, and a branch pipe, 9, connects with exhaustpipe 9. A pipe, f, is connected to the steamspace of the boiler, so that live'steam may be used to draw in air through the T-shaped casting D, to which the pipes f and g are connected, and force it into the muffler, said cold air serving to cool the hood. Both of these pipes are provided with a cook or valve, 6 and f. A pipe, 9, may be connected to the exhaust-tips in the smoke-arch, which connect with the exhaust-pipes of the cylinders, which usually create the draft in the chimney or Smokestack. In the muffler,in some instances,

I place, in combination with the perforated plates 0, a quantity of fine wire, h, bywhich the steam and air entering into said muffler is comminuted into minute particles and thoroughly mixed before passing through the tubes or thimbles d into the furnace, and tends to deaden or dampen the fire in the furnace in a similar manner as above described.

Having thus described my invention, what I claim,and desire to secure by Letters Patent, 1s-

1. In a mufller connected with the safetyvalve, a perforated hood having tapered tubes arranged on its surface for holding a fireproof material, in combination with perforated plates and a wire-filling, as set forth.

2. In a muffler connected with the safety- Valve, the combination of a perforated hood having perforated plates arranged within it with a branch-piece provided with steam-jets for drawing in air and forcing it through said hood into the furnace, substantially as and for the purpose set forth.

3. The combination of a perforated hood, 0, having perforated plates and connected by abranch piece, D,'with the atmosphere, a pipe, 6, with the safety-valve, and a pipe, f, with the live steam of the boiler, all arranged substantially asand for the purpgse herein specified; Intestim ny whereef'l atfix my signature in 4. The eombinatiqn of afurnage or fipefpox' ppesenceqf two witnesses.

with a perforated hood extending transversely across the furnace, having one or more per- ALFRED BERNEY' 5 forated plates, and connected to a safety-valve, Witnesses:

all substantially as and for the purposes set GUY' L. DE MOTTE,

forth. HENRY E. EARLE. 

